<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
    <style>
        .outer{
            width: 120px;
            overflow: hidden;
        }
        .box{
            width: 50px;
            height: 50px;
            float: left;
        }
    </style>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        let arr = [
            "red","blue","yellow","green","aqua"
        ]
        const vDOM=<div className="outer">
            {arr.map((color)=>{
                return <div style={{"background":color}} className="box"></div>
            })}
            </div>
            ReactDOM.createRoot(document.getElementById("app")).render(vDOM)
    </script>
</body>
</html>